힘든 일

difficult task

→ 힘들다
phrase Uncommon #10,035
difficult task 일 can mean work, a task, or a matter, depending on context.
KO: 새로운 환경에 적응하는 건 힘든 일이에요.
EN: Adjusting to a new environment is a difficult task.

힘든 일도 아니에요

It's not even difficult.

— 행복한 라짜로 (2018)